1 /* 2 * Copyright 1995-2022 The OpenSSL Project Authors. All Rights Reserved. 3 * 4 * Licensed under the Apache License 2.0 (the "License"). You may not use 5 * this file except in compliance with the License. You can obtain a copy 6 * in the file LICENSE in the source distribution or at 7 * https://www.openssl.org/source/license.html 8 */ 9 10 /* 11 * DSA low level APIs are deprecated for public use, but still ok for 12 * internal use. 13 */ 14 #include "internal/deprecated.h" 15 16 #include <stdio.h> 17 #include "internal/cryptlib.h" 18 #include <openssl/bn.h> 19 #include <openssl/evp.h> 20 #include <openssl/objects.h> 21 #include <openssl/asn1.h> 22 #include <openssl/rsa.h> 23 #include <openssl/dsa.h> 24 #include <openssl/ec.h> 25 26 #include "crypto/evp.h" 27 28 EVP_PKEY *d2i_PublicKey(int type, EVP_PKEY **a, const unsigned char **pp, 29 long length) 30 { 31 EVP_PKEY *ret; 32 EVP_PKEY *copy = NULL; 33 34 if ((a == NULL) || (*a == NULL)) { 35 if ((ret = EVP_PKEY_new()) == NULL) { 36 ERR_raise(ERR_LIB_ASN1, ERR_R_EVP_LIB); 37 return NULL; 38 } 39 } else { 40 ret = *a; 41 42 #ifndef OPENSSL_NO_EC 43 if (evp_pkey_is_provided(ret) 44 && EVP_PKEY_get_base_id(ret) == EVP_PKEY_EC) { 45 if (!evp_pkey_copy_downgraded(©, ret)) 46 goto err; 47 } 48 #endif 49 } 50 51 if ((type != EVP_PKEY_get_id(ret) || copy != NULL) 52 && !EVP_PKEY_set_type(ret, type)) { 53 ERR_raise(ERR_LIB_ASN1, ERR_R_EVP_LIB); 54 goto err; 55 } 56 57 switch (EVP_PKEY_get_base_id(ret)) { 58 case EVP_PKEY_RSA: 59 if ((ret->pkey.rsa = d2i_RSAPublicKey(NULL, pp, length)) == NULL) { 60 ERR_raise(ERR_LIB_ASN1, ERR_R_ASN1_LIB); 61 goto err; 62 } 63 break; 64 #ifndef OPENSSL_NO_DSA 65 case EVP_PKEY_DSA: 66 if (!d2i_DSAPublicKey(&ret->pkey.dsa, pp, length)) { 67 ERR_raise(ERR_LIB_ASN1, ERR_R_ASN1_LIB); 68 goto err; 69 } 70 break; 71 #endif 72 #ifndef OPENSSL_NO_EC 73 case EVP_PKEY_EC: 74 if (copy != NULL) { 75 /* use downgraded parameters from copy */ 76 ret->pkey.ec = copy->pkey.ec; 77 copy->pkey.ec = NULL; 78 } 79 if (!o2i_ECPublicKey(&ret->pkey.ec, pp, length)) { 80 ERR_raise(ERR_LIB_ASN1, ERR_R_ASN1_LIB); 81 goto err; 82 } 83 break; 84 #endif 85 default: 86 ERR_raise(ERR_LIB_ASN1, ASN1_R_UNKNOWN_PUBLIC_KEY_TYPE); 87 goto err; 88 } 89 if (a != NULL) 90 (*a) = ret; 91 EVP_PKEY_free(copy); 92 return ret; 93 err: 94 if (a == NULL || *a != ret) 95 EVP_PKEY_free(ret); 96 EVP_PKEY_free(copy); 97 return NULL; 98 } 99